{"api_version":"1","generated_at":"2026-09-25T09:21:40+00:00","cve":"CVE-2026-93808","urls":{"html":"https://cve.report/CVE-2026-93808","api":"https://cve.report/api/cve/CVE-2026-93808.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93808","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93808"},"summary":{"title":"ALSA: usb-audio: caiaq: validate EP1 reply lengths","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: caiaq: validate EP1 reply lengths\n\nusb_ep1_command_reply_dispatch() uses buf[0] as a command byte and then\nreads command-specific fixed items from the same URB buffer. Several\npaths use buf + 1, buf[1], buf[2], or buf + 3 without first proving that\nurb->actual_length contains those bytes.\n\nAdd per-command length checks, use a payload length derived from the\nbytes after the command byte for the control-state copy, and reject short\nanalog input payloads before the input helper reads fixed offsets from\nthe EP1 reply.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-24 17:17:13","updated_at":"2026-09-24 17:17:13"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/af8a172c4f71ac30d625f2966d2389a7fa872819","name":"https://git.kernel.org/stable/c/af8a172c4f71ac30d625f2966d2389a7fa872819","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aba30af07d4fe499b50209801eba9da8a815522f","name":"https://git.kernel.org/stable/c/aba30af07d4fe499b50209801eba9da8a815522f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/74f3c639f64fa5da4e1613149798b5089bce2807","name":"https://git.kernel.org/stable/c/74f3c639f64fa5da4e1613149798b5089bce2807","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93808","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93808","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 af8a172c4f71ac30d625f2966d2389a7fa872819 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 74f3c639f64fa5da4e1613149798b5089bce2807 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 aba30af07d4fe499b50209801eba9da8a815522f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.111 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18.53 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.111 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.53 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["sound/usb/caiaq/device.c","sound/usb/caiaq/input.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"af8a172c4f71ac30d625f2966d2389a7fa872819","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"74f3c639f64fa5da4e1613149798b5089bce2807","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"aba30af07d4fe499b50209801eba9da8a815522f","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"6.12.111","status":"affected","version":"0","versionType":"semver"},{"lessThan":"6.18.53","status":"affected","version":"0","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["sound/usb/caiaq/device.c","sound/usb/caiaq/input.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.111","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.53","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.111","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: caiaq: validate EP1 reply lengths\n\nusb_ep1_command_reply_dispatch() uses buf[0] as a command byte and then\nreads command-specific fixed items from the same URB buffer. Several\npaths use buf + 1, buf[1], buf[2], or buf + 3 without first proving that\nurb->actual_length contains those bytes.\n\nAdd per-command length checks, use a payload length derived from the\nbytes after the command byte for the control-state copy, and reject short\nanalog input payloads before the input helper reads fixed offsets from\nthe EP1 reply."}],"providerMetadata":{"dateUpdated":"2026-09-24T16:02:43.621Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/af8a172c4f71ac30d625f2966d2389a7fa872819"},{"url":"https://git.kernel.org/stable/c/74f3c639f64fa5da4e1613149798b5089bce2807"},{"url":"https://git.kernel.org/stable/c/aba30af07d4fe499b50209801eba9da8a815522f"}],"title":"ALSA: usb-audio: caiaq: validate EP1 reply lengths","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93808","datePublished":"2026-09-24T16:02:43.621Z","dateReserved":"2026-09-18T17:59:28.790Z","dateUpdated":"2026-09-24T16:02:43.621Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-24 17:17:13","lastModifiedDate":"2026-09-24 17:17:13","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93808","Ordinal":"1","Title":"ALSA: usb-audio: caiaq: validate EP1 reply lengths","CVE":"CVE-2026-93808","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93808","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: caiaq: validate EP1 reply lengths\n\nusb_ep1_command_reply_dispatch() uses buf[0] as a command byte and then\nreads command-specific fixed items from the same URB buffer. Several\npaths use buf + 1, buf[1], buf[2], or buf + 3 without first proving that\nurb->actual_length contains those bytes.\n\nAdd per-command length checks, use a payload length derived from the\nbytes after the command byte for the control-state copy, and reject short\nanalog input payloads before the input helper reads fixed offsets from\nthe EP1 reply.","Type":"Description","Title":"ALSA: usb-audio: caiaq: validate EP1 reply lengths"}]}}}